RE: Track/Sector Indicator on Drives

From: David Wood (
Date: 2003-09-05 10:39:28

Hm.. I might be able to convince a german friend to translate ;)

At any rate, I imagine watching the servo lines on the 6522 is a good idea. 
You can calibrate just like the mech does by counting to 0 as it slams the
head stop and keeping track from there.

I dont know, however, what to do when the drive doesnt need to slam the stop
after initial power-up. :(


On Fri, 5 Sep 2003, Baltissen, GJPAA (Ruud) wrote:

> Hallo Nick,
> I only can imagine a track indicator because at 360 rpm the sector info
> would change about 120 time/sec. :)
> The track indicator is just a hardware trick. AFAIK the device watches some
> lines of the 6522 and in- or decreases the numbers according the read
> signals. I have two at home and will ahve a closer look. It was also
> published in a 64'er so I could scan it. One drawback: it is in German.
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